To go right to the last stage, instead of pressing SPACE on the beggining of the game, press CONTROL and a password will be requested. Write MOHENJO DARO
  Choose one of the 4 similar doors. The fifth is available only when you finish all the others.
  From left to right, we have: door 1, door 2, door 3 and door 4.
  To enter boss's room, is necessary to be carring the weapon that has the icon corresponding to door's icon.

DOOR 1
 Stage 5-1 MAP

DOOR 2
 Stage 5-2 MAP

DOOR 3
 Stage 5-3 MAP

DOOR 4
 Stage 5-4 MAP
Obs: Use Cles in this stage. He can reach easier the boss's room door.